Zb. Alfassi et N. Lavi, INTERNAL STANDARDS FOR HIGH DEAD-TIME MEASUREMENTS IN NAA, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 365(1), 1995, pp. 190-192
A method for the measurement of a minute activity of a short-lived nuc
lide embedded in longer-lived higher activity matrix was developed. Th
e method is based on the findings that the ratio of the activities of
two gamma lines is independent of the dead-time. Another method of mat
hematical correction was also checked and found to be quite accurate.